Portland ended a challenging five-game East Coast trip Friday with an impressive and dominant 91-74 victory over the Chicago Bulls. Sixth Man Mo Williams scored 18 points off the bench and Lopez added 13 points, nine rebounds and five blocks, as the Blazers won their second consecutive game. ... The win, coupled with a Thursday victory at Atlanta, ended a long dry spell for the Blazers, who had been 3-8 in their previous 11 games. ... Aldridge was the catalyst for the turnaround, returning from a seven-game absence to play in the back-to-back. ... Coach Terry Stotts said Friday he had settled on a rotation for the Blazers' stretch run — and probable playoff berth — and it will include Williams, Dorell Wright, Will Barton and Thomas Robinson, in addition to the starters.